It's a real PITA to have to re-enter the APN settings after every iOS update. What causes the data loss? I back up the phone (4S) to iTunes and iCloud before each software update and the APN settings don't get copied back onto the phone during the update process. After updating, when I try to use Cellular Data, I have none. Then I realize the APN setting has been screwed with again, all the settings fields are completely blank. Anyone else have this problem after updating the iOS on their phones?
Sent from my iPhone 4S or iPad 3rd gen, whichever I happened to have in my hands at the time, using iPF.net